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West Nile virus transmission cycle

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Picture of the West nile virus transmission cycle

Illustration copyright 2005. Adapted from the U.S. Centers for Disease Control and Prevention. Available online: http://www.cdc.gov

Mosquitoes become infected with West Nile virus when they bite infected birds and then may transmit the virus to humans and animals when they bite to take blood.

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Last Updated: 08/25/2008

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